import java.util.Scanner;

public class Test {
    public static String toLowerCase(String str) {
        char[] arr = str.toCharArray();
        for (int i = 0; i < arr.length; i++) {
            if(arr[i] >= 'A' && arr[i] <= 'Z') {
                arr[i] += 32;
            }
        }
        return new String(arr);
    }
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String str = sc.nextLine();
        System.out.println(toLowerCase(str));
    }
}
